Motion transmitting mechanism



Oct. 24, 1939. w P ALLER 2,177,398

MOTION TRANSMITTING MECHANISM Filed March 10, 1938 E 7 4 INVENTOR.

Mike/L 7 ATTORNEY.

Patented Get. 24, 193$ UNITED STATES MOTION mnsm'rrme meonpmswr Willis Fay Allen- Dayton, Ohio, assignor to The Sheffield 'Gage Corporation, Dayton, Ohio, a

corporation oi Ohio Application March 10, 1938, Serial No. 195,047

3 Claims.

This invention relates to motion transmitting mechanism.

One object of the invention is the provision of a motion transmitting device adapted to transmit motion in one direction'to equal or proportionate motion in another direction and embodying supporting and supported members which are connected together by a pair of widely diverging flat spring blades providing for rotational movement of the supported member while eliminating all lost motion and avoiding the poss'ibility of play in the parts.

Another object of the invention is the provision of a device of the character mentioned in which the two members are connected by two spring blades diverging from the supporting member at a wide angle to one another, the opposite ends of the blades being connected rigidly to the two members and determining the fulcrum axis of the supported member at the line of intersection of the planes of the spring blades.

Other objects and advantages of the invention will be apparent from the following description, the appended claims, and the accompanying drawing, in which:

Fig. 1 is a side elevation of a. motion trans- I mitting device embodying the present invention;

Fig. 2 is a side elevation of the same;

Fig. 3 is a detail view of one of the spring blades;

Fig. 4 is a perspective detail view of one of the blade retaining blocks; and' Fig. 5 is a detail View of the end of the stationary or supporting member.

Referring more particularly to the drawing by reference numerals, Figs. 1 to 5 inclusive show a motion transmitting device in which a supported member Ill, herein shown as an angle lever, is mounted on 'a supporting member I l, to which it is connected by a plurality of widely diverging, flat spring blades 82 and i3, preferably formed of steel and having their opposite ends secured rigidly to the members Ill and ii. The supporting member ii is preferably provided with an offset an integral portion it having shallow slots l5 and IS the depth of which corresponds'to the thickness of the spring blades l2 and E3, the width of the slots corresponding to the width of the side projections l'l provided on the ends of the spring 50 blades as shown in Fig. 3. Additional slots I8 and i9, which are also of a depth corresponding to the thickness of the spring blades, are provided in the offset portion I 4 of the support and receive end portions of the spring blades so that the 5 outer surfaces of the spring blades are substantially flush with the outer surfaces of the sides of the projecting portion i4. Clamping blocks 20 and 2| hold the ends of the spring blades securely in place, the blocks 20 and 2| being retained by screws 22 which are threaded into the d ofiset portion H of the support. With the side projections 81 of the springs fitting tightly in the slots [5 and I6 and the end portions of the spring blades fitting tightly in the slots [8 and iii the springs are prevented from moving endwise w or from swinging in the direction of their own planes.

The opposite ends of the spring blades l2 and I3 are securely held by means of clamp blocks 24 and 25 held by screws 26 and 21 in the sup- 15 ported member H]. The supporting blocks 2t have projections 28 which engage the lateral projections on the ends of the spring blades, and the blocks 24 fit within the recesses in the supported member l0 tightly so as to prevent any 20 movement of the clamped ends of the spring blades at their areas of attachment.

The two spring blades 12 and I3 extend at a wide angle with respect to one another, preferably an angle of the order of 90, and provide a sup- 25 port for the member l0 affording rotational movements of the member ID, through small angles, about an axis or fulcrum lines determined by the line of intersection of the two planes of the two spring blades, the member It) being supan ported for very free movement about this axis when the spring blades are in their normal straight position. In view of the rigid connection between the ends of the spring blades and the supporting and supported members, there is no lost motion present, the movement of the supported member In taking place in such manner as to truly produce a proportionate movement in one direction at one end of the member as another end of the member is moved.

Near one end of the supported member ill the latter has fixed thereto a hardened ball thrust member 30 adapted to be engaged and moved by an operating member 3| which moves horizontally as viewed in Fig. 1 and which may be the operated member of a gaging device adapted for checking sizes of specimens. At a remote point, the member ID is provided with a hardened thrust surface 32 which produces a vertical movement of the gage plunger 33 of a suitable gaging device 34 having an indicating mechanism of any suitable character. An indicating mechanism such as is disclosed in the prior application of Aller and Markwick Serial No. 162,085 filed September 2, 1937, may be employed. as

angles such as unduly deflect and bend the spring blades 12 and I3, and to limit the motion of the member to, the latter is provided with a hole 31 somewhatlarger than a stud 38 which is secured in the member l0 and which projects into the hole, the distance between the sides of the stud 38 and the sides of the hole determining the degree of movement permitted.

As will now be apparent, the operating member 3! moves in a direction at substantially 90 to one of the blades and substantially parallel to the other blade, while the plunger 33 of the gaging device is operable in a direction at substantially 90 to'one of the blades and substantially parallel to the other, so that the reaction and thrust forces to which the supported member is subjected are effectively assumed without undue strain or undue deflection or bending in the blades, and a very accurate reproduction of a proportionate movement is provided for.

While the form of apparatus herein described constitutes apreferred embodiment of the invention, it is to be understood that the invention is not limited to this preciseform of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. A motion transmitting device comprising a fixed member and a lever member which is adapted to transmit movement applied to one portion thereof to proportionate movement at another portion thereof, and means for mounting said lever member for small swinging movement the fixed member to the lever member at a wide angle to determine the fulcrum axis of the lever member at the point of intersection of the planes- 'of said flat blades. v

-2. A motion transmitting device adapted to transmit movement applied to one portion thereof to proportionate movement at another portion thereof, comprising a supporting member, a supported member, and a pair of flat, thin, flexible,

at the same side of all of the connection locations and adjacent an end of each of the blades, actuating means operable at substantially 90 to one of said blades for transmitting motion to one portion of said supported member, and means operable inv a direction substantially 90 from the other of said blades and receiving motion from another portion of said supported member proportionate to the movement of said actuating means.

3. A motion transmitting device adapted to transmit movement applied to one portion thereof to proportionate movement at another portion thereof, comprising a supporting member, a sup-.

ported member, and a pair of flat, thin,'flexible, normally straight blades of equal length diverging from one another at an angle of the order of 90, said blades mounting said supported member \for smallswinging movement on said supporting" member and eachhaving one end thereof rigidly connected to said supported member at locations widely spaced apart and having the other end thereof rigidly connected to the supporting member at locations close together and providing a fixed axis of rotation of the supported member substantially at the point of intersection of the planes of said flat blades, actuating means operable at substantially 90 to one of said-blades for transmitting motion to one portionof said supported member, and means operable in a direction substantially 90? from the other of said blades and receiving motion from another portion of said supported member proportionate to the movement of said actuating means.

WILLIS FAY ALLER.. 

